WJMK

WJMK (104.3 FM) is a classic hits radio station in Chicago, Illinois. The station is known as "K-Hits 104.3." The station adopted this format on March 14, 2011, after spending 6 years as Jack FM. Prior to that, WJMK spent 21 years as an oldies station. WJMK is owned by CBS.

The station broadcasts with an ERP of 4.1 kW from a transmitter atop Willis Tower (formerly Sears Tower), and its studios are located at Two Prudential Plaza in the Loop.

HD Programming

WJMK broadcasts in HD.

History

1948 license

The 104.3 allocation in Chicago was originally licensed in 1948 to the Chicago Federation of Labor, and went on the air as WCFL-FM on March 12, 1949. Though licensed for 22,000 watts, it only broadcast from 3pm to 9pm, as a 400-watt simulcast of WCFL (AM) from an antenna on top of the studio. In early October 1949, the Federation shut down WCFL-FM and announced that they would surrender their FM license because they saw no possibility to make money with it.